Module: Vertical Distance to Channel Network
(c) 2002 by O.Conrad
Menu: Terrain Analysis > Channels
Description
This module calculates the vertical distance to a channel network base level. The algorithm consists of two major steps:
1. Interpolation of a channel network base level elevation grid
2. Subtraction of this grid from the original elevations

Parameters
NameTypeIdentifierDescriptionConstraints
Input
Elevation Grid (input)ELEVATIONA grid that contains elevation data.
Channel Network Grid (input)CHANNELSA grid providing information about the channel network. It is assumed that no-data cells are not part of the channel network. Vice versa all others cells are recognised as channel network members.
Output
Vertical Distance to Channel NetworkGrid (output)ALTITUDEThe resulting grid gives the altitude above the channel network in the same units as the elevation data.
Channel Network Base Level (*)Grid (optional output)BASELEVELThis optional grid output contains the interpolated channel network base level elevations.
Options
Tension Threshold [m]Floating pointTHRESHOLD
Keep Base Level below SurfaceBooleanNOUNDERGROUND
(*) optional